bbb-A-plus-ratedGive Us a Call, We Install Them All! 314-429-7000

We Like Our Alside Windows, But We Offer One-Stop Shopping for All Major Window Manufacturers, Including Marvin, Pella, Jeld Wen and The Rest! Save Yourself The Hassle and Give Us a Call, We Install Them All!




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Give Mills Window & Door a Call, We Install It All!

With over 25 years of Window, Door & Millwork industry experience in the St. Louis and surrounding area, Mills Window & Door is known for the quality, value, and excellent customer service that we provide our residential clients. Our knowledgeable and professional staff will go the distance to ensure your Window and Door purchase and installation meets and exceeds your standards. From the initial consultation, throughout the selections and purchase process, through installation and for years to come, you will find the staff at Mills Window & Door ready and willing to serve your replacement Window, Low-Maintenance Vinyl Siding, & Patio Door needs. We will also take the time to properly educate you on our complete line of products, so that you can be certain you are choosing the right products and materials, at a price you can afford.

Quality Replacement Windows

Whether you are remodeling, renovating or building a new home, Mills Window & Door offers a number of new and replacement window options in styles ranging from traditional to contemporary, and in various sizes such as Single-Hung, Double-Hung, Sliding, Casement, Awning, Swing & Clean, Bay, Bow, Garden, Picture and Specialty Shaped Windows to fit your home’s precise style needs. We also carry and install Energy Star approved energy efficient replacement windows, which will keep your home warmer in the winter and cooler in the summer. In addition to a variety of window configurations, styles and colors, we have an extensive choice of grid patterns and glass styles to create the perfect finish to your window and home design project.

Can’t find what you’re looking for? We install it all! Mills Window and Door offers services above and beyond the products we carry in our showroom, giving you the ability to choose from any window style or brand. We’ll even work with the manufacturer to get you the best price and have our professional service team install them!

Entry, Patio and Sliding Doors

Replacing entryway, patio and sliding doors in your home is easy with Mills Window & Door. We offer Contemporary, Classic, French, and Traditionally styled doors that will open your home’s ambiance with the light of the outdoors, create a fresh and inviting entryway, and visually expand and brighten any room. Our entry doors and patios doors are precision-built with slim profiles that are energy efficient and can save you valuable floor space, all at affordable prices. All of our doors are built using the finest materials and with quality workmanship in mind, so you can trust that they will stand up to the elements indefinitely.

Low Maintenance Vinyl Siding

Whether you are remodeling a Victorian jewel or building a new home, whatever your budget, you will find that Mills Window & Door’s low maintenance vinyl siding offers the choice and value you’re looking for. You wouldn’t order new windows from a roofing contractor, so it does not make any sense to order your siding from anyone but an expert in the field. From our energy efficient vinyl siding to the decorative accents that create custom style, Mills Window & Door carries high-end vinyl siding that will give the exterior of your home an entirely new look. This siding is easy to maintain and will look good for the life of your home.

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Why Choose Us?

  • We Install All Brands of Windows, Doors & Siding, Even if We Don’t Carry It!
  • 25+ years of Window, Door & Millwork Industry Experience in the St. Louis Area
  • We Are Known for Our Quality, Value, and Excellent Customer Service
  • We’ll Work With the Manufacturer to Get You the Best Pricing!
  • We’re a Hands-On Owner Directed Company, Small Enough to be Personal & Cost Effective, With the Resources to Get Your Job Completed.


I would definitely recommend Kevin and the Mills team!  They were very responsive from beginning to end and my new windows look amazing!
Suzanne F., Brentwood, Homeowner
I’ve had the pleasure of working with Jim and his team on two projects recently, and cannot say enough good about them! They truly care about the work they do, which makes doing business with them so easy and I can rest assured that they have our best interests at heart.
Amanda M.
We have used Mills Window and Door a number of times. The biggest project was the installation of 400 windows in a six story high rise complex. They did a superb job, and their product was excellent.
Patricia S., Personalized Property Mgt., Inc.
During my tenure as Director of Facilities and Grounds, Mills Window and Door successfully provided and installed custom windows for several historic structures at the Saint Louis Zoo. The Zoo was quite satisfied with the installation and the windows. We would not hesitate to award similar work to Mills Window and Door in the future.
David M. Vice President Architecture and Planning, Saint Louis Zoo
Mills WIndow and Door installed 454 windows on our Barclay Facility in Clayton. We were very satisfied with the outcome and would not hestitate to engage them again.
Joseph B. CEO, Bethesda Health Group